Plenarvorträge - DPG-Tagungen

More documents

Recommendations

Info

Symposium Physics of Foams Tagesübersichten Hauptvorträge PHYSICS OF FOAMS (SYPF) Herr Prof. John Banhart Hahn-Meitner-Institut Abteilung SF3 Glienicker Str. 100 14109 Berlin E-Mail: banhart@hmi.de ÜBERSICHT DER HAUPTVORTRÄGE UND FACHSITZUNGEN (Hörsaal H16) SYPF 1.1 Mi 14:00 (H16) The foam/emulsion analogy in structure and drainage, Stefan Hutzler, Nicolas Peron, Denis Weaire, Wiebke Drenckhan SYPF 3.1 Mi 16:20 (H16) Die Stabilität metallischer Schäume, Dietmar Leitlmeier Fachsitzungen SYPF 1 Foams I Mi 14:00–14:30 H16 SYPF 1.1–1.1 SYPF 2 Foams II Mi 14:30–15:50 H16 SYPF 2.1–2.4 SYPF 3 Metallic Foams I Mi 16:20–16:50 H16 SYPF 3.1–3.1 SYPF 4 Metallic Foams II Mi 16:50–18:30 H16 SYPF 4.1–4.5 SYPF 5 Physics of Foams Di 14:30–16:30 C SYPF 5.1–5.4
Symposium Physics of Foams Mittwoch Fachsitzungen – Haupt-, Kurzvorträge und Posterbeiträge – SYPF 1 Foams I Zeit: Mittwoch 14:00–14:30 Raum: H16 Hauptvortrag SYPF 1.1 Mi 14:00 H16 The foam/emulsion analogy in structure and drainage — •Stefan Hutzler, Nicolas Peron, Denis Weaire, and Wiebke Drenckhan — Physics Department, Trinity College Dublin, Ireland In recent years the study of the physics of foams has advanced across a wide front. Often the analysis of a property will begin with the assertion that the same description applies equally well to an emulsion. However, this is rarely tested. We have therefore revisited some of the key experiments, using a watersilicone oil emulsion system (stabilised by surfactants) of similar scale to familiar foam systems. Here we present illustrations of several ordered SYPF 2 Foams II structures in cylindrical tubes, essentially identical to those observed in foams. We have also performed the common foam experiment of “forced drainage” on these emulsions, i.e. adding surfactant solution from the top at constant flow rates. These experiments suggest that drainage is of the Poiseuille type flow of liquid past the drops. At high flow rates the drops exhibit oscillations within the emulsion, eventually leading to a break-up of the arrangement. This differs from the behaviour of foams, where varies types of convective instabilities set in, once a critical flow rate, dependent on bubble size and geometry, is exceeded. Zeit: Mittwoch 14:30–15:50 Raum: H16 SYPF 2.1 Mi 14:30 H16 The role of geometrical optics for light transport in dry foams — •Holger Stark 1 and MirFaez Miri 2 — 1 Universität Konstanz, Fachbereich Physik, D-78457 Konstanz, Germany — 2 Institute For Advanced Studies in Basic Sciences, Zanjan, Iran Recent light-scattering experiments on foams suggest that the light transport is diffusive. This means that single photons can be considered as random walkers. However, there is a debate in literature about the main mechanism underlying the random walk. One suggestion is that it is based on light scattering from Plateau borders and/or vertices. On the other hand, since the cells are much larger than the wavelength of light, one can employ geometrical optics and follow a light beam or photon as it is reflected by the liquid films with a probability r called the intensity reflectance. This naturally leads to a random walk of the photons in space. Here we study the second mechanism based on geometrical optics in two steps using numerical simulations. In a first model, we introduce topological and geometrical disorder based on a 2D Voronoi foam model and choose a constant r to investigate the influence of disorder. In a second model, we use the realistic intensity reflectance r of thin films and also consider disorder in the film thickness. Comparing our results to recent experiments, we find that the geometrical optics approach reproduces experimental features and the right order of magnitude for the diffusion constant. This convinces us that geometrical optics is an important mechanism for the diffusive light transport in foams. SYPF 2.2 Mi 14:50 H16 Effect of colloidal charges on the thickness of foam films — •Regine v. Klitzing, Branko Kolaric, and Tatjana Mauser — Stranski-Laboratorium, TU Berlin, Str. d. 17. Juni 112, 10623 Berlin Polymers can be used as stabilizers of foams. To use polymers in an efficient way in surfactant systems, it is necessary to control and to manipulate the building blocks, i.e. the single free-standing surfactant films of a foam. In our experiments the film thickness is controlled on a mesoscopic length scale (5-100 nm) by varying the outer pressure in a thin film pressure balance. The sum of interactions (DLVO, steric, structural forces) between the film surfaces is determined quantitatively by the disjoining pressure. The addition of polyelectrolytes affects the (de)stability of the film due to complexation between polymer and surfactant at the film surfaces. In dependence on the charge combination of the surfactant and polyelectrolyte either a Newton Black Film (NBF, stabilized by steric repulsion) or a Common Black Film (CBF, stabilized by electrostatic repulsion) occurs at high outer pressure. The influence of polyelectrolytes on the film stability is compared to the effect of hard colloids. SYPF 2.3 Mi 15:10 H16 Single foam films and macroscopic foams stabilized by CnTAB: influence of the chain length — •Cosima Stubenrauch 1 , Judith Schlarmann 1 , and Khristo Khristov 2 — 1 Institut für Physikalische Chemie, Universität zu Köln, Luxemburgerstr. 116, D-50939 Köln, Deutschland — 2 Institute of Physical Chemistry, Bulgarian Academy of Sciences, u. Acad, G. Bonchev 11, Sofia 1113, Bulgarien A quantitative comparison of single foam films and the corresponding macroscopic foams is very difficult. One problem is the fact that investigations of foam films are usually performed at constant capillary pressures P, whereas in macroscopic foams P is a function of the height of the foam column. A way out of this dilemma is to examine films and foams at the same P. The method of choice for the foam films is the ”thin film pressure balance ” (TFPB) with which the film thickness is measured as a function of P. The corresponding investigation of macroscopic foams is based on the ”foam pressure drop technique” (FPDT). As in the TFPB a constant P is applied at which the rate of drainage as well as the lifetime of the foam is determined. In order to study the correlation between the properties of films and foams we investigated the homologous series of the cationic alkyl trimethyl ammonium bromides CnTAB with n = 10,12,14, and 16. For this series a strong increase of foam film stability was observed when the chain length was increased from n = 12 to n = 14. In order to show that this change is also reflected in the properties of the macroscopic foam we measured the lifetime and the drainage of the respective CnTAB foams with the FPDT as a function of P. The results will be compared and discussed. SYPF 2.4 Mi 15:30 H16 Foam Analysis by the Foam Pressure Drop Technique — •R. Miller 1 , C. Stubenrauch 2 , Khr. Khristov 3 , L. Christov 3 , A.V. Makievski 4 , and D. Exerowa 3 — 1 MPI für Kolloid- und Grenzfl¨chenforschung, Am Mühlenberg 1, D-14476 Golm, Germany — 2 Institute Phys. Chem., University Cologne, Luxemburger Str. 116, D-50939 Cologne, Germany — 3 Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria — 4 SINTERFACE Technologies, Volmer Str. 5-7, D-12489 Berlin, Germany Foam is a complex capillary system and the processes of foam drainage and foam destruction (stability) are important for its properties. These processes are interrelated in a very peculiar way. The questions on which would be the predominating mechanism or how would the processes impact on each other depend entirely on the characteristics of the foam. The complex relationships make it very hard to assess the different processes independently. Moreover, for many application the drainage is important, for example in firefighting, food industry, while for others the lifetime (stability) plays the major role, such as in foam concentration, foam separation. The characterisation of foams by the foam pressure drop technique
Page 1 and 2:
Plenarvortrag PV I Mo 08:30 H1 Bose
Page 3 and 4:
Plenarvortrag PV XIV Fr 09:15 H1 As
Page 5 and 6:
Chemische Physik und Polymerphysik
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Dielektrische Festkörper Montag Fa
Page 37 and 38:
Dielektrische Festkörper Dienstag
Page 39 and 40:
Dielektrische Festkörper Dienstag
Page 41 and 42:
Dielektrische Festkörper Mittwoch
Page 43 and 44:
Dielektrische Festkörper Donnersta
Page 45 and 46:
Dünne Schichten Tagesübersichten
Page 47 and 48:
Dünne Schichten Montag Fachsitzung
Page 49 and 50:
Dünne Schichten Montag implantatio
Page 51 and 52:
Dünne Schichten Montag mond film a
Page 53 and 54:
Dünne Schichten Montag We studied
Page 55 and 56:
Dünne Schichten Mittwoch DS 12 Sch
Page 57 and 58:
Dünne Schichten Mittwoch multilaye
Page 59 and 60:
Dünne Schichten Mittwoch condensat
Page 61 and 62:
Dünne Schichten Donnerstag DS 18.5
Page 63 and 64:
Dünne Schichten Donnerstag In a se
Page 65 and 66:
Dünne Schichten Dienstag DS 22.9 D
Page 67 and 68:
Dünne Schichten Dienstag layers re
Page 69 and 70:
Dünne Schichten Dienstag oscillati
Page 71 and 72:
Dünne Schichten Dienstag DS 22.48
Page 73 and 74:
Dynamik und Statistische Physik Tag
Page 75 and 76:
Dynamik und Statistische Physik Tag
Page 77 and 78:
Dynamik und Statistische Physik Mon
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Dynamik und Statistische Physik Die
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Dynamik und Statistische Physik Mit
Page 95 and 96:
Dynamik und Statistische Physik Don
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Dynamik und Statistische Physik Fre
Page 113 and 114:
Halbleiterphysik Tagesübersichten
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Halbleiterphysik Montag diated by t
Page 121 and 122:
Halbleiterphysik Montag HL 3.12 Mo
Page 123 and 124:
Halbleiterphysik Montag die die opt
Page 125 and 126:
Halbleiterphysik Montag up a so cal
Page 127 and 128:
Halbleiterphysik Montag concentrati
Page 129 and 130:
Halbleiterphysik Montag HL 12 Poste
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Halbleiterphysik Montag tion in thi
Page 139 and 140:
Page 141 and 142:
Halbleiterphysik Montag Anregungsqu
Page 143 and 144:
Halbleiterphysik Montag laubt. Wir
Page 145 and 146:
Halbleiterphysik Dienstag HL 15 Pho
Page 147 and 148:
Halbleiterphysik Dienstag HL 15.13
Page 149 and 150:
Halbleiterphysik Dienstag HL 17 II-
Page 151 and 152:
Halbleiterphysik Dienstag HL 18 Hau
Page 153 and 154:
Halbleiterphysik Dienstag HL 20.7 D
Page 155 and 156:
Halbleiterphysik Dienstag method of
Page 157 and 158:
Halbleiterphysik Dienstag Infrared
Page 159 and 160:
Halbleiterphysik Dienstag cally Ass
Page 161 and 162:
Halbleiterphysik Mittwoch HL 27.10
Page 163 and 164:
Halbleiterphysik Mittwoch Efficient
Page 165 and 166:
Halbleiterphysik Mittwoch HL 29.9 M
Page 167 and 168:
Halbleiterphysik Mittwoch middle of
Page 169 and 170:
Halbleiterphysik Mittwoch This work
Page 171 and 172:
Halbleiterphysik Donnerstag HL 36 Q
Page 173 and 174:
Page 175 and 176:
Halbleiterphysik Donnerstag HL 38 H
Page 177 and 178:
Halbleiterphysik Donnerstag HL 39 H
Page 179 and 180:
Page 181 and 182:
Halbleiterphysik Donnerstag Py-Elek
Page 183 and 184:
Halbleiterphysik Donnerstag proved
Page 185 and 186:
Halbleiterphysik Donnerstag barrier
Page 187 and 188:
Halbleiterphysik Donnerstag found t
Page 189 and 190:
Halbleiterphysik Donnerstag HL 44.5
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Halbleiterphysik Freitag HL 47.6 Fr
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Magnetismus Tagesübersichten MA 4
Page 203 and 204:
Magnetismus Montag states and curli
Page 205 and 206:
Magnetismus Montag structurally dif
Page 207 and 208:
Magnetismus Montag Unterstützt dur
Page 209 and 210:
Magnetismus Montag MA 8 Elektronent
Page 211 and 212:
Magnetismus Dienstag that the proxi
Page 213 and 214:
Magnetismus Dienstag spintronic dev
Page 215 and 216:
Magnetismus Dienstag performed at t
Page 217 and 218:
Magnetismus Dienstag len: einen mit
Page 219 and 220:
Magnetismus Dienstag MA 13.28 Di 15
Page 221 and 222:
Magnetismus Dienstag termination an
Page 223 and 224:
Magnetismus Dienstag in der Schicht
Page 225 and 226:
Page 227 and 228:
Magnetismus Dienstag microscopy and
Page 229 and 230:
Magnetismus Dienstag the Zeeman eff
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Magnetismus Mittwoch MA 15.5 Mi 16:
Page 237 and 238:
Magnetismus Mittwoch Single-crystal
Page 239 and 240:
Magnetismus Donnerstag MA 19 Hauptv
Page 241 and 242:
Magnetismus Donnerstag MA 20.11 Do
Page 243 and 244:
Magnetismus Donnerstag MA 23 Hauptv
Page 245 and 246:
Magnetismus Donnerstag MA 26 Mikro-
Page 247 and 248:
Magnetismus Donnerstag tropie versc
Page 249 and 250:
Magnetismus Donnerstag magnon wave-
Page 251 and 252:
Magnetismus Donnerstag Fe/MnF2. The
Page 253 and 254:
Magnetismus Freitag MA 30.7 Fr 12:1
Page 255 and 256:
Metallphysik Tagesübersichten Haup
Page 257 and 258:
Metallphysik Montag Fachsitzungen -
Page 259 and 260:
Metallphysik Montag cke, Nestler an
Page 261 and 262:
Metallphysik Montag [1] S.G. Mayr a
Page 263 and 264:
Metallphysik Montag M 10 Diffusion
Page 265 and 266:
Metallphysik Dienstag M 13 Mechanis
Page 267 and 268:
Metallphysik Dienstag Entmischung a
Page 269 and 270:
Metallphysik Dienstag tile (TiO2) s
Page 271 and 272:
Metallphysik Dienstag werden. M 18.
Page 273 and 274:
Metallphysik Mittwoch erstaunlicher
Page 275 and 276:
Metallphysik Donnerstag M 23 Hauptv
Page 277 and 278:
Metallphysik Donnerstag dies einen
Page 279 and 280:
Metallphysik Donnerstag M 30 Mechan
Page 281 and 282:
Metallphysik Donnerstag M 32 Grenzf
Page 283 and 284:
Oberflächenphysik Tagesübersichte
Page 285 and 286:
Oberflächenphysik Montag Fachsitzu
Page 287 and 288:
Oberflächenphysik Montag O 4 Organ
Page 289 and 290:
Oberflächenphysik Montag Nb2O3 str
Page 291 and 292:
Oberflächenphysik Montag O 8 Haupt
Page 293 and 294:
Oberflächenphysik Montag O 10 Teil
Page 295 and 296:
Oberflächenphysik Montag se packed
Page 297 and 298:
Oberflächenphysik Montag ventionel
Page 299 and 300:
Oberflächenphysik Montag hydrocarb
Page 301 and 302:
Oberflächenphysik Montag DAPQDI on
Page 303 and 304:
Oberflächenphysik Montag I bzw. Ty
Page 305 and 306:
Oberflächenphysik Montag O 14.54 M
Page 307 and 308:
Oberflächenphysik Montag We report
Page 309 and 310:
Oberflächenphysik Montag hand the
Page 311 and 312:
Oberflächenphysik Dienstag ments a
Page 313 and 314:
Oberflächenphysik Dienstag Variati
Page 315 and 316:
Oberflächenphysik Dienstag tum mec
Page 317 and 318:
Oberflächenphysik Dienstag transla
Page 319 and 320:
Oberflächenphysik Dienstag ter mob
Page 321 and 322:
Oberflächenphysik Dienstag der the
Page 323 and 324:
Oberflächenphysik Mittwoch For Cs
Page 325 and 326:
Oberflächenphysik Mittwoch aufgel
Page 327 and 328:
Oberflächenphysik Mittwoch The Naf
Page 329 and 330:
Oberflächenphysik Mittwoch O 28.49
Page 331 and 332:
Oberflächenphysik Mittwoch We stud
Page 333 and 334:
Oberflächenphysik Mittwoch Cs-pads
Page 335 and 336:
Oberflächenphysik Donnerstag is id
Page 337 and 338:
Oberflächenphysik Donnerstag A Pt(
Page 339 and 340:
Oberflächenphysik Donnerstag O 34
Page 341 and 342:
Oberflächenphysik Donnerstag O 37.
Page 343 and 344:
Oberflächenphysik Donnerstag iment
Page 345 and 346:
Oberflächenphysik Donnerstag keits
Page 347 and 348:
Oberflächenphysik Freitag O 43 Ads
Page 349 and 350:
Oberflächenphysik Freitag going fr
Page 351 and 352:
Oberflächenphysik Freitag where Cu
Page 353 and 354:
Tiefe Temperaturen Tagesübersichte
Page 355 and 356:
Page 357 and 358:
Page 359 and 360:
Tiefe Temperaturen Montag Fachsitzu
Page 361 and 362:
Tiefe Temperaturen Montag TT 3.2 Mo
Page 363 and 364:
Tiefe Temperaturen Montag ticity. A
Page 365 and 366:
Tiefe Temperaturen Montag We presen
Page 367 and 368:
Tiefe Temperaturen Montag vated by
Page 369 and 370:
Tiefe Temperaturen Montag TT 8.11 M
Page 371 and 372:
Tiefe Temperaturen Montag TT 8.25 M
Page 373 and 374:
Tiefe Temperaturen Montag with the
Page 375 and 376:
Tiefe Temperaturen Montag with a fe
Page 377 and 378:
Tiefe Temperaturen Dienstag TT 10 F
Page 379 and 380:
Tiefe Temperaturen Dienstag TT 11.9
Page 381 and 382:
Tiefe Temperaturen Dienstag eventua
Page 383 and 384:
Tiefe Temperaturen Dienstag tisch g
Page 385 and 386:
Tiefe Temperaturen Dienstag rochlor
Page 387 and 388:
Tiefe Temperaturen Dienstag TT 17.3
Page 389 and 390:
Tiefe Temperaturen Dienstag relevan
Page 391 and 392:
Tiefe Temperaturen Mittwoch TT 18.2
Page 393 and 394:
Tiefe Temperaturen Mittwoch number
Page 395 and 396:
Tiefe Temperaturen Mittwoch which r
Page 397 and 398:
Page 399 and 400:
Tiefe Temperaturen Mittwoch 2003 TT
Page 401 and 402:
Tiefe Temperaturen Mittwoch nahe 0,
Page 403 and 404:
Tiefe Temperaturen Mittwoch fields
Page 405 and 406:
Page 407 and 408:
Tiefe Temperaturen Donnerstag TT 26
Page 409 and 410:
Tiefe Temperaturen Donnerstag With
Page 411 and 412:
Tiefe Temperaturen Donnerstag pair
Page 413 and 414:
Tiefe Temperaturen Donnerstag linea
Page 415 and 416:
Tiefe Temperaturen Donnerstag non-G
Page 417 and 418:
Tiefe Temperaturen Donnerstag sowie
Page 419 and 420:
Tiefe Temperaturen Freitag TT 31 Su
Page 421 and 422:
Tiefe Temperaturen Freitag Näherun
Page 423 and 424:
Vakuumphysik und Vakuumtechnik Tage
Page 425 and 426:
Vakuumphysik und Vakuumtechnik Mont
Page 427 and 428:
Ausschuss Industrie und Wirtschaft
Page 429 and 430:
Arbeitskreis Biologische Physik Tag
Page 431 and 432:
Arbeitskreis Biologische Physik Tag
Page 433 and 434:
Arbeitskreis Biologische Physik Mon
Page 435 and 436:
Arbeitskreis Biologische Physik Die
Page 437 and 438:
Arbeitskreis Biologische Physik Don
Page 439 and 440:
Arbeitskreis Biologische Physik Fre
Page 441 and 442:
Page 443 and 444:
Page 445 and 446:
Page 447 and 448:
Page 449 and 450:
Page 451 and 452:
Page 453 and 454:
Page 455 and 456: Arbeitskreis Biologische Physik Fre
Page 457 and 458: Arbeitskreis Biologische Physik Fre
Page 459 and 460: Arbeitskreis Physik sozio-ökonomis
Page 467 and 468: Symposium Fat-Tail Distributions -
Page 469 and 470: Symposium Life Sciences on the Nano
Page 483 and 484: Symposium Non-Fermi Liquids in Quan
Page 485 and 486: Symposium Functional Nanoparticles
Page 487 and 488: Symposium Organic and Hybrid System
Page 505: Symposium Organic and Hybrid System
Page 509 and 510: Symposium Physics of Foams Mittwoch
Page 511 and 512: Symposium Quantum Shot Noise in Nan
Page 513 and 514: Symposium X-RAY Magneto-Optics Tage
Page 515 and 516: Symposium X-RAY Magneto-Optics Dien
Page 517 and 518: Lehrertage Regensburg Hauptvorträg
Page 519 and 520: A. D., Mirlin .................HL 1
Page 521 and 522: Breidenbach, Boris ........ AKB 50.
Page 523 and 524: Elli, Alexandra .............SYLS 3
Page 525 and 526: Greer, Lindsay ......... M 9.1, M 1
Page 527 and 528: Horn-von Hoegen, M. O 13.2, O 14.40
Page 529 and 530: Korn, Tobias ...............MA 13.6
Page 531 and 532: Martin, Tobias ............. MA 13.
Page 533 and 534: Partyka, Ewa ................ M 18.
Page 535 and 536: Rugeramigabo, Eddy Patrick O 14.38,
Page 537 and 538: Sihler, J. .................... DS
Page 539 and 540: Volz, K. .................... HL 44
show all

Plenarvorträge - DPG-Tagungen

Create successful ePaper yourself

Delete template?

Save as template?